New California rules aimed at curbing the surprising amount of pollution coming from leaf blowers, lawn mowers and other small gas-powered machines cleared a final hurdle Monday, and are set to take effect on Jan. 1.
The requirements mark another step in the state’s long-running battle to reduce emissions from a category of small engines that have come to rival cars as a source of smog-forming pollution.
The American Public Health Association (APHA) is endorsing the EPA rule that would strengthen national air quality standards for ozone pollution. Today’s proposal would lower the standard for ground-level ozone, or smog, to 70 parts per billion.
Ozone is a gas that you cannot see or smell. Ozone occurs naturally in the sky about 10 to 30 miles above the earth's surface. Sometimes, this ozone is called "good ozone" because it forms a layer that protects life on earth from the sun's harmful rays. Ground-level ozone, on the other hand, can be bad for your health and the environment.
